It told me that the City and some parts of London south of the river were 20 minutes away from Highgate. While I have managed to drive from Highgate to Moorgate

It told me that the City and some parts of London south of the river were 20 minutes away from Highgate. While I have managed to drive from Highgate to Moorgate in seven minutes, it relied on every traffic light along the way being green, it being 7am on a public holiday and a loose regard to the posted speed limit. Any other time forty minutes would be more accurate. Were you to take the existing road times and triple them, you'd like get a more realistic circle IMO.